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Lower-GWP non-flammable refrigerant blends to replace HFC-134a.

Number: 0943

Author(s) : SKYE H., DOMANSKA P., MCLINDEN M., BABUSHOK V., BELL I., FORTIN T., HEGETSCHWEILER M., HUBER M., KEDZIERSKI M., KIM D., LIN L., LINTERIS G., OUTCALT S. , PAYNE W. V., PERKINS R., ROWANE A.

Summary

Non-flammable, lower global-warming-potential (GWP) refrigerants are needed to replace HFC-134a (GWP=1300) in military equipment. We previously used thermodynamic cycle simulations to screen 100 000+ refrigerant blends and identified 23 candidate replacements. In the present study we narrowed the candidates to three “best” blends and measured their “drop-in” performance in a military environmental control unit (ECU) tested in environmental chambers. Through simulations, the laboratory-measured performance was extrapolated to that of ECUs equipped with a compressor modified for each blend to provide the same system capacity while maintaining the isentropic efficiency of the original HFC-134a compressor. R-513A (GWP=573) and Tern-1 [R-134a/1234yf/1234ze(E) (49.2/33.9/16.9 %mass), GWP=640] are good replacement blends for HFC-134a, offering a similar capacity and COP at GWP reductions of 66 % and 51 %, respectively. These fluids do not present significant application difficulties. For a greater reduction of GWP, R-515B (GWP=344) can be considered but it requires further development.

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Details

  • Original title: Lower-GWP non-flammable refrigerant blends to replace HFC-134a.
  • Record ID : 30031887
  • Languages: English
  • Subject: Technology, HFCs alternatives
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0943

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